This study seeks to determine whether 30 treatments with AMES, to the proximal affected arm of subjects with chronic stroke, will improve subjects' proximal arm active range-of-motion. We hypothesize that the combination of assisted movement, torque biofeedback, and muscle vibration will reduce impairment (i.e., increase strength and range-of-motion; decrease inappropriate patterns of muscle contraction) and, thereby, lead to more accurate reaching with the proximal arm.